PurposeUSED TO PREVENT ACCIDENTAL RETRACTION OF MAIN & NOSE LANDING GEAR DURING GROUND OPERATIONS. ALSO USED TO SUPPORT DISPATCH OF AIRPLANE WITH LANDING GEAR FIXED IN THE DOWN & LOCKED POSITIONAirplane777-200, 777-200ER, 777-200LR, 777-300, 777-300ER, 777-8, 777-9, 777F, 787-10, 787-8, 787-9Usage CodeMAINTENANCE 